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M-14 AUTO FUEL

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btripp(at)interisland.net
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Posted: Sat Aug 18, 2007 11:27 am Post subject: M-14 AUTO FUEL

Is it possible to run the M14 on auto fuel? I've heard rumors that it 

is possible, but I can't find anything in print on it. If it is 

possible, what modifications have to be made to the engine?

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ScottA

Joined: 05 Jan 2006
Posts: 100
Location: Park City, UT

Posted: Sat Aug 18, 2007 2:01 pm Post subject: M-14 AUTO FUEL

I know of 5 or 6 Moose running on auto fuel and a few of the YAK guys too.

You won't find any 'official' information in print - only opinions.



http://www.goflyamoose.com/main_pages/m14faq.shtm#m14faq3



No modifications required. Just no alcohol like all the actual STC's. 



Scott



--

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cliff(at)gesoco.com
Guest

Posted: Mon Aug 20, 2007 12:12 pm Post subject: M-14 AUTO FUEL

It is possible to run the M-14P on Autofuel with some caveats.



Remember the whole point of octane rating is to suppress detonation and 

pre-ignition.

As compression rating increases, the risk of detonation and pre-ignition 

increases.  Therefore in high compression engines or engines which 

increase the manifold pressure (supercharged and turbocharged engines) a 

higher octane rating is required.



Motorstar (the current engine manufacturer) recommends an MON octane 

rating of no less than 91.



Automotive gasoline is rated by the RON+MON/2 method.

Aviation gasoline is rated by rich operating mixture/ lean operating 

mixture (ie. 100/130)



Therefore I don't recommend using an automotive fuel of less than 94 octane.



As stated previously, do not use auto fuel which contains alcohol..for a 

number reasons.

Most notably, it will attack the seals and diaphragms in the fuel system.



Finally, I would recommend that if autofuel is used, that it's mixed 

with Avgas because:

1) The Avgas will raise the octane rating.

2) Avgas is very stable and will not degrade like autofuel.

Hope this helps!



Cheers,

Cliff Coy

Gesoco Industries



bob tripp wrote:



 	  Quote: 	
		   

 <btripp(at)interisland.net>



 Is it possible to run the M14 on auto fuel? I've heard rumors that it 

 is possible, but I can't find anything in print on it. If it is 

 possible, what modifications have to be made to the engine?

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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